Ive run a cable to my shed for lighting that is fluresent tubes, also for my fans in the summer. Heating is not needed, your rabbits will grow there winter coats and to not need added heat.Ive even had babys in the shed in the winter with no worries there fine. G/pigs i would worry a bit about if we had bad snow,there not so hardy but ive still had mine outside just with a lot of straw up to the foof of there cage in there bed part. val